pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-90458-20551_Argyle_is_My_Name.ps) >>/Users/jc/w/tmp/Tune-90458-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ERM/20551_Argyle_is_My_Name.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-90458-20551_Argyle_is_My_Name.abc 582 ABC music file with the extracted tune(s)
Tune-90458-20551_Argyle_is_My_Name.ps 35795 PostScript
Tune-90458-20551_Argyle_is_My_Name.txt 582 Plain-text file with the extracted tune(s)
Tune-90458-get.log 4671 Log file, useful mostly for debugging
These files should be available for 24 hours.